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公开(公告)号：JP2000070683A
公开(公告)日：2000-03-07
申请号：JP24820598
申请日：1998-09-02
Applicant: TORAY INDUSTRIES
Inventor： SAKAI KENJI , FUJII YOSHINARI
Abstract: PROBLEM TO BE SOLVED: To provide a hollow fiber membrane type permeation membrane module capable of removing pathogenic protozoa such as cryptosporidium or the like or pollutants by a filter member comprising a filter material having a pore size larger than that of the hollow fibers arranged on the membrane permeation side in the module even if the hollow fiber membranes arranged in the module are damaged and capable of supplying only clear filtered water to the outside of the module. SOLUTION: In this hollow fiber membrane type permeation membrane module wherein tube plates 4a, 4b partitioning a hermetically closed container into first, second and third chambers liquidtightly and at least one hollow fiber membrane elements 7 attached to the tube plates 4a, 4b to be arranged in the second chamber are arranged, a filter member 5 comprising a filter material having a pore size larger than that of the hollow fiber of the hollow fiber membrane element 7 is incorporated on the membrane permeation side of filter a hollow fiber membrane permeated soln. by the filter member 5.
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公开(公告)号：JP2000070682A
公开(公告)日：2000-03-07
申请号：JP24290298
申请日：1998-08-28
Applicant: TORAY INDUSTRIES
Inventor： TANIGUCHI MASAHIDE , FUJII YOSHINARI , SAKAI KENJI
Abstract: PROBLEM TO BE SOLVED: To obtain a hollow fiber membrane module capable of stably obtaining high transmitted water quantity and high water quality. SOLUTION: In a hollow fiber membrane module wherein hollow fiber membrane bundles obtained by forming a large number of hollow fiber membranes 1 into a U-shape are housed in a container 6 and bonded and fixed at the end parts thereof to be opened, the cross-sectional area S of the inside part of the container 6 at the parts of non-bonded and unfixed hollow fiber membranes is set so that a part of an area S1 substantially smaller than the cross-sectional area S2 of the inside part of the container 6 in the vicinity of the bonded and fixed part is present.
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公开(公告)号：JP2000000439A
公开(公告)日：2000-01-07
申请号：JP16706598
申请日：1998-06-15
Applicant: TORAY INDUSTRIES
Inventor： FUJII YOSHINARI , SAKAI KENJI
Abstract: PROBLEM TO BE SOLVED: To surely remove foreign matter including pathogenic protozoa, etc., in spite of the rupture of hollow fiber membranes by building a filter member consisting of a filter material having the pore diameter larger than the pore diameter of the hollow fiber membranes into a membrane permeation side to filter the permeated liquid of the hollow fiber membranes. SOLUTION: Hollow fiber membranes 2 bundled to a U shape are inserted into an outer cylinder 1 of a membrane module and a bundle of the hollow fiber membranes 2 is adhered and fixed by a potting material 3 at the end of the outer cylinder 1. A filter member 5 consisting of the filter material having the pore diameter larger than the pore diameter of the hollow fiber membranes 2 is built into the outer cylinder by bringing the same into contact with aperture end faces 4 of the hollow fiber membranes 2. A module cap 8 for collecting the filtrate is them mounted at the end faces. The raw water contg. pollutants from raw water supply nozzles 10A and 10B is introduced into a membrane module and is permeated through the membranes from the outer side to the inner side of the hollow fiber membranes 2. The membrane filtrate is passed to the filter member 5 and is taken out to the outside of the membrane module from a permeated water outlet nozzle 6.
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公开(公告)号：JP2000000438A
公开(公告)日：2000-01-07
申请号：JP17121198
申请日：1998-06-18
Applicant: TORAY INDUSTRIES
Inventor： MINEGISHI SHINICHI , SAKAI KENJI , TANIGUCHI MASAHIDE
Abstract: PROBLEM TO BE SOLVED: To prevent the leakage of water to be treated to which particulates are added even when hollow fiber membranes are damaged and to suppress the degradation in the quality of permeated water by subjecting the water to be treated to external pressure filtration through the hollow fiber membranes. SOLUTION: The water to be treated side is set at the pressure higher on the outer side of the hollow fiber membranes by using a pressurizing means, such as a pump, and the water to be treated is supplied and is permeated fully or partly to the inner side of the hollow fiber membrane. The impurities larger than the pores of the membranes among the impurities included in the water to be treated are blocked by the skin layers on the outside surfaces of the hollow fiber membranes and are accumulated on the outside surfaces of the hollow fiber membranes. The filtration is continued in this state while the impurities accumulated on the outside surfaces of the hollow fiber membranes are removed by physical washing, such as backflow washing, for passing clean water and gas from the inner side toward the outer side of the hollow fiber membranes and, thereafter, the water contaminated water in the hollow fiber membrane module is once discharged to the outside of the hollow fiber membrane module and the filtration is repeated by again supplying the water to be treated.
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公开(公告)号：JPH11347549A
公开(公告)日：1999-12-21
申请号：JP15420498
申请日：1998-06-03
Applicant: TORAY INDUSTRIES
Inventor： SAKAI KENJI , TANIGUCHI MASAHIDE
Abstract: PROBLEM TO BE SOLVED: To prevent the supply of filtrate of defective quality by installing a by-path for connecting a filtrate line and a raw water line and circulating the filtrate to the raw water line through the by-path corresponding to the indication value of a water quality meter. SOLUTION: A raw water line 11 has a line including a tank for storing raw water, a raw water pump 4 for supplying the raw water to a membrane module 6, and a raw water valve 8 for controlling the flow rate of the raw water, and a filtrate line 12 has a line including a water quality meter 7 set downstream from the membrane module 6 and a filtrate valve 9. A by-path 13 is installed in order to connect the raw water line 11 and the filtrate line 12. The quality of the filtrate is detected by the water quality meter 7, and the filtrate is circulated to the raw water line 11 through the by-pass 13 according to the indicated value of the quality of the filtrate, so that by removing the filtrate when its quality is defective, the filtrate of constantly stabilized quality can be supplied.
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Patent Agency Ranking
公开(公告)号：JPH11319501A
公开(公告)日：1999-11-24
申请号：JP12601598
申请日：1998-05-08
Applicant: TORAY INDUSTRIES
Inventor： TANIGUCHI MASAHIDE , SAKAI KENJI , MINEGISHI SHINICHI
Abstract: PROBLEM TO BE SOLVED: To provide a hollow fiber membrane module which can maintain the quality of permeated water at a high level even when the membranes are damaged by making the internal flow path cross section area of at least one part of hollow fiber membrane- fixed parts consisting of plural hollow fiber membranes with end parts fixed adhesively smaller than the internal flow path cross section area of the hollow fiber membranes in the non-adhesively fixed part. SOLUTION: In the hollow fiber membrane module comprising a plurality of hollow fiber membranes 1 with at least one of the end parts fixed adhesively while an open state is maintained by an adhesively fixed part 2. The part 8 is provided where the internal flow path cross section area of a hollow fiber membrane 2 of at least one part of hollow fiber membrane 1-adhesively fixed parts is substantially smaller than the internal flow path cross section area of the hollow fiber membrane 1 in the non- adhesively fixed part. Thus it is possible to inhibit the deterioration of the quality of permeated water, even when an untreated water flows into the interior of the hollow fiber membrane 1 due to damage inflicted to the membrane 1. Besides, even when a comparatively large amount of pollutant is contained in the untreated water, the pollutant is accumulated in the contracted dia. part 8 to generate a cake filtration state.
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公开(公告)号：JP2003190746A
公开(公告)日：2003-07-08
申请号：JP2001396486
申请日：2001-12-27
Applicant: TORAY INDUSTRIES
Inventor： SAKAI KENJI , ONOE TOSHIJI , OKADA HIROMICHI
Abstract: PROBLEM TO BE SOLVED: To provide a film element excellent in produceability by decreasing the number of parts constituting the element; and a fresh water generation method using the same. SOLUTION: This film element has a support plate and a film arranged at both sides of the support plate to remove impurities from a liquid and is characterized in that the support plate comprises a flat base plate, frame bodies A which cover the two ends of the base plate facing each other, and frame bodies B which cover the other two ends of the base plate facing each other and are connected to the frame bodies A. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2001321766A
公开(公告)日：2001-11-20
申请号：JP2000141793
申请日：2000-05-15
Applicant: TORAY INDUSTRIES
Inventor： SAKAI KENJI , TANIGUCHI MASAHIDE , NISHIMURA KAZUHIKO
Abstract: PROBLEM TO BE SOLVED: To provide a sheet membrane type filtration membrane element, enabling bulk treatment by increasing a treatment amount per the unit membrane area of the sheet membrane type filtration membrane element that cannot make a membrane area per the unit volume large compared with a hollow fiber membrane type filtration membrane element. SOLUTION: In this sheet membrane type filtration membrane element, flow passage materials are installed on both sides of a support plate, and a fluid separating membrane for removing impurities in the liquid is arranged on the flow passage material. The fluid separating membrane has a flow pure water permeability coefficient of 5×10-9 m3/m2.Pa.s or more. When a permeate flows between the support plate mounted with the flow passage materials and the fluid separating membrane in the direction of a permeate discharging port, the flow passage material to be used has a coefficient (b) of b0
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公开(公告)号：JP2000015062A
公开(公告)日：2000-01-18
申请号：JP18607798
申请日：1998-07-01
Applicant: TORAY INDUSTRIES
Inventor： FUJII YOSHINARI , SAKAI KENJI , NISHIMURA KAZUHIKO
Abstract: PROBLEM TO BE SOLVED: To prevent the leakage of microorganisms such as pathogenic protozoans even when hollow fiber membranes are broken by incorporating a filter of a filter medium whose hole diameter is greater than the pore diameter of the filter membrane of a filter membrane module in the after stage of the module. SOLUTION: Membrane filter raw water is supplied to a filter membrane module 2 by a raw water pump 1, passes through a filter 3 of a filter medium whose hole diameter is greater than the pore diameter of the filter membrane of the module 2, and is taken out as filtrate. In the normal operation of the filter 3, valves 7, 8 are closed, and the filtrate is taken out from a valve 11. In case of the breakage of the filter membrane of the module 2 to cause the accumulation of pathogenic protozoans on the surface of the filter medium. valves 9. 11 are closed, and hot water is supplied from a hot water-washing circulation tank 4 to the filter 3 through valves 8. 10 to be circulated through the valve 7. In this way, the pathogenic protozoans are exterminated.
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公开(公告)号：JPH11319520A
公开(公告)日：1999-11-24
申请号：JP12705098
申请日：1998-05-11
Applicant: TORAY INDUSTRIES
Inventor： TANIGUCHI MASAHIDE , SAKAI KENJI , SEKI TAKASHI
IPC: B01D69/08
Abstract: PROBLEM TO BE SOLVED: To make it possible to maintain the quality of a permeating water at a high level even when a hollow fiber membrane is damaged by setting the ratio between the length of an adhesively fixed part and the inner dia. of the hollow fiber membrane within a specific range, in a hollow fiber membrane module which is composed of a plurality of hollow fiber membranes, at least one-end parts of which are adhesively fixed. SOLUTION: When the hollow fiber membrane module consisting of a plurality of hollow fiber membranes 1, at least one-end parts of which are adhesively fixed and opened, is used in an outer pressure system by which an untreated water is made to flow outside the hollow fiber membranes 1, a pollutant in the untreated water is blocked on the outer surface of the membranes 1 under a normal state. Consequently, a clean water permeating through the interior of the hollow fiber membranes 1, flows and is delivered from a permeating water outlet 4. In this case, when the length of the hollow fiber membrane 1 in the adhesively fixed part 2 is given as L mm and the inner dia. of the follow fiber membrane 1 as Dμm, the hollow fiber membrane module is formed so that the relationship of 3.0
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